#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

//class list
//{
//public:
//	char i;
//	int a;
//};

class list
{
	char* ch1;
};

class Date
{
public:
	Date()
	{
		_year = 0;
		_mon = 0;
		_day = 0;
	}

	void print()
	{
		cout << _year << "-" << _mon << "-" << _day << endl;
	}

private:
	int _year;
	int _mon;
	int _day;
};

int main()
{
	Date d1;
	d1.print();

	return 0;
}